6.—(1) In addition to its powers under section 201 of the 1995 Act (powers of harbour authorities as local lighthouse authorities) but subject to obtaining any necessary interest in or over land, the conservancy authority may erect or place, alter, discontinue or remove aids to navigation in any place immediately adjacent to the estuary.
(2) The conservancy authority must not exercise the powers under paragraph (1) without the approval of Trinity House.